Bubble detection device
By designing a bubble detection device and utilizing an optical system and a fused silica detection cell, the problem of detecting microbubbles was solved, thereby improving the performance of carbon fiber products.
Patent Information
- Application Number
- CN202520477321.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-03-19
AI Technical Summary
Existing technologies are insufficient for effectively detecting microbubbles in polymers, which affects the performance of carbon fiber products, and manual observation is inefficient.
Design a bubble detection device that employs an optical system consisting of a laser, a beam expander lens, a Fourier transform lens, and an image sensor. The device detects bubbles by converting light signals into electrical signals and uses a detection cell made of fused silica to improve light transmittance and mechanical strength.
This technology enables efficient and accurate detection of bubbles in polymers, improving the quality stability and production efficiency of carbon fiber products.
Smart Images
Figure CN223679062U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to carbon fiber production equipment technical field, specifically relates to a bubble detection device. BACKGROUND
[0002] Carbon fiber is widely applied in aerospace, wind power generation, sports supplies and other fields because of its excellent properties such as high strength, high temperature resistance and corrosion resistance. Polyacrylonitrile-based carbon fiber is made of acrylonitrile as the main raw material through polymerization, spinning, pre-oxidation, carbonization and other core process sections. In the polymerization stage, azobisisobutyronitrile (AIBN) is used as the initiator of free radical polymerization reaction, and its decomposition will release nitrogen.
[0003] Because the viscosity of the polymer will immediately increase after the temperature drops, it is not easy for the bubbles to overflow from the polymer. In addition, the liquid flows too fast during the conveying process of the spinning dope, which will also cause the generation of bubbles. If the spinning solution contains bubbles, it will affect the drawing process and thus reduce the performance of the carbon fiber product, and even cause hairiness and broken filaments. During the production process, the polymerization liquid is subjected to defoaming treatment, and whether there are bubbles is observed by a sight glass manually. However, the micro-bubbles are difficult to identify with the naked eye, so it is necessary to detect and observe the bubbles inside the equipment. SUMMARY
[0004] The utility model mainly solves the technical problem existing in the prior art, and provides a bubble detection device.
[0005] The above technical problems of the utility model are mainly solved by the following technical scheme: a bubble detection device, comprising a shell, detection pool shell walls are arranged on the left and right sides of the middle part of the inner cavity of the shell, a detection pool cavity is formed between the two detection pool shell walls, an inlet is formed on the top of the shell corresponding to the detection pool cavity, an outlet is formed on the bottom of the shell corresponding to the detection pool cavity, the inlet and the outlet are communicated with the detection pool cavity, a lens cavity is formed on the front side of the detection pool cavity in the shell, an imaging cavity is formed on the back side of the detection pool cavity in the shell, a laser is inserted into one side of the shell, one end of the laser is inserted into the lens cavity, sliding rails are arranged on the top and the bottom of the lens cavity and the imaging cavity, a front side sliding groove is formed on the top of the lens cavity, first and second beam expansion lens frames are arranged between the sliding rails of the lens cavity, the top of the first and second beam expansion lens frames extends to the top of the shell through the front side sliding groove, Fourier spectrum conversion lens frames and imaging lens frames are arranged between the sliding rails of the imaging cavity, an image sensor is arranged on the back end of the imaging cavity, a rear side sliding groove is formed on the top of the imaging cavity, and the top of the Fourier spectrum conversion lens frames extends to the top of the shell through the rear side sliding groove.
[0006] As preferred, one end surface of the laser is sleeved with a heat dissipation disc.
[0007] As preferred, the first beam expander frame, the second beam expander frame and the Fourier spectrum transform lens frame are of the same structure, the first beam expander frame comprises a mounting frame, the top and the bottom of the mounting frame are provided with clamping sleeves, the bottom of the clamping sleeve at the top is provided with a top lead screw, the top of the top lead screw extends out of the shell, the top surface of the top lead screw is sleeved with a head cap, and the surface of the top lead screw outside the shell is sleeved with an adjusting nut.
[0008] As preferred, the bottom of the clamping sleeve at the bottom is provided with a bottom lead screw, the surfaces of the top lead screw and the bottom lead screw are sleeved with a sliding carriage sliding with the sliding rails, the bottom of the bottom lead screw extends through the sliding carriage to the bottom of the sliding carriage, and the bottom surface of the bottom lead screw is sleeved with a limiting nut.
[0009] As preferred, the front side of the top of the shell is rotationally provided with a front side cover, the front side cover is arranged at the top of the front side sliding groove, the rear side of the top of the shell is rotationally provided with a rear side cover, the rear side cover is arranged at the top of the rear side sliding groove, and one side of each of the front side cover and the rear side cover is provided with a handle.
[0010] The utility model has the beneficial effects:
[0011] 1. The light beam is diffused by the first beam expander and the second beam expander until irradiated to the detection pool, the detection pool shell wall adopts fused quartz material, can resist acid and alkali and organic solvent, and the light transmittance is greater than 90%. In order to guarantee the mechanical strength of the detection pool and the maximum light transmittance, the thickness is preferably 2-4mm, and the polishing is to Ra≤0.01 μm, so as to avoid surface scattering interference. The scattering process that occurs when light wave meets the particle of size close to or greater than the light wavelength is described by the Mie scattering. Since the bubble diameter is equivalent to the incident light wavelength, the light signal mainly in the Mie scattering is detected, and the measurement is most accurate. The light signal is converted into electrical signal by the imaging lens, the image sensor and the image acquisition card and is transmitted to the computer for data reading, so that the internal bubble content in the liquid can be better judged.
[0012] 2. The top lead screw is arranged at the top of the mounting frame, and the top of the top lead screw is arranged outside the shell through the adjusting nut, so that the height of the mounting frame in the shell can be adjusted. The limiting nut arranged at the bottom of the top lead screw is adjusted in advance to have a spacing with the sliding carriage, so that the height of the shell can be prevented from being too high, and the limiting effect is achieved. The front side sliding groove and the rear side sliding groove are respectively arranged at the top of the shell, and the front side cover and the rear side cover are respectively arranged to avoid the external light from entering the shell and to achieve the light shielding effect. BRIEF DESCRIPTION OF DRAWINGS
[0013] Fig. 1 is a kind of three-dimensional structure schematic diagram of the utility model;
[0014] Fig. 2 is a kind of sectional structure schematic diagram of the utility model;
[0015] Fig. 3 is a kind of three-dimensional structure schematic diagram of the utility model first beam expander frame.
[0016] In the figure: 1, shell;11, import;12, export;13, detection pool shell wall;14, front side sliding groove;15, front side cover;151, handle;16, rear side cover;17, rear side sliding groove;18, slide rail;2, laser;21, heat dissipation disc;3, first beam expander frame;31, mounting frame;32, clamping sleeve;33, top screw;34, head cap;35, adjusting nut;36, sliding frame;37, bottom screw;38, limit nut;4, second beam expander frame;5, Fourier spectrum conversion lens frame;6, imaging lens frame;7, image sensor. DETAILED DESCRIPTION
[0017] The technical scheme of the utility model is further specifically described below by examples and in conjunction with the drawings.
[0018] Example: a bubble detection device, as shown in Figs. 1-3 shown, including shell 1, the left and right sides of the middle part in the cavity of shell 1 are provided with detection pool shell wall 13, the detection pool shell wall 13 between the two constitutes detection pool cavity, the top of shell 1 is provided with import 11 corresponding detection pool cavity, the bottom of shell 1 is provided with export 12 corresponding detection pool cavity, import 11 and export 12 are communicated with detection pool cavity, the front side of the detection pool cavity in the inside of shell 1 forms lens cavity, the rear side of the detection pool cavity in the inside of shell 1 forms imaging cavity, the one side of shell 1 is inserted with laser 2, the one end of laser 2 is inserted into lens cavity, the surface of the one end of laser 2 is sleeved with heat dissipation disc 21, for playing the effect of heat dissipation, the top and bottom of lens cavity and imaging cavity are provided with slide rail 18, the top of lens cavity is provided with front side sliding groove 14, the slide rail 18 between lens cavity is respectively provided with first beam expander frame 3 and second beam expander frame 4, the top of first beam expander frame 3 and second beam expander frame 4 extends to the top of shell 1 through front side sliding groove 14, the slide rail 18 between imaging cavity is respectively provided with Fourier spectrum conversion lens frame 5 and imaging lens frame 6, the rear end of imaging cavity is provided with image sensor 7, the top of imaging cavity is provided with rear side sliding groove 17, front side sliding groove 14 and rear side sliding groove 17 are both provided in the top of shell 1, the top of Fourier spectrum conversion lens frame 5 extends to the top of shell 1 through rear side sliding groove 17.
[0019] The first expansion lens holder 3, the second expansion lens holder 4 and the Fourier spectrum conversion lens holder 5 are same in structure, the first expansion lens holder 3 comprises a mounting frame 31, the top and the bottom of the mounting frame 31 are provided with a sleeve 32, the bottom of the sleeve 32 located at the top is provided with a top lead screw 33, the top of the top lead screw 33 extends out of the shell 1, the top surface of the top lead screw 33 is sleeved with a head cap 34, the surface of the top lead screw 33 located outside the shell 1 is sleeved with an adjusting nut 35, the bottom of the sleeve 32 located at the bottom is provided with a bottom lead screw 37, the surfaces of the top lead screw 33 and the bottom lead screw 37 are sleeved with a sliding frame 36 sliding with the sliding rail 18, the bottom of the bottom lead screw 37 extends to the bottom of the sliding frame 36 through the sliding frame 36, and the bottom surface of the bottom lead screw 37 is sleeved with a limiting nut 38.
[0020] The front side of the top of the shell 1 is rotationally provided with a front side cover 15, the front side cover 15 is arranged at the top of the front side sliding groove 14, the rear side of the top of the shell 1 is rotationally provided with a rear side cover 16, the rear side cover 16 is arranged at the top of the rear side sliding groove 17, and one side of each of the front side cover 15 and the rear side cover 16 is provided with a handle 151.
[0021] The principle of the utility model is as follows: after connecting the liquid outlet end of the defoaming kettle at the inlet 11 and the outlet 12, then adjusting the interval of the first expansion lens holder 3 and the second expansion lens holder 4 on the sliding rail 18, rotating the adjusting nut 35 at the top downwards until the top of the shell 1 is limited, and moving the position of the rear Fourier spectrum conversion lens holder 5 before and after the sliding frame 36, the imaging effect on the rear imaging lens holder 6 is convenient, finally, the spectrum irradiates to the image sensor 7, and the light type is converted into an electrical signal and transmitted to the computer.
[0022] Finally, it should be pointed out that the above embodiments are only relatively representative examples of the utility model. Obviously, the utility model is not limited to the above embodiments, and there are many variants. Any simple modification, equivalent change and modification made according to the technical essence of the utility model to the above embodiments should be considered as falling within the protection scope of the utility model.
Claims
1. A bubble detection device, comprising a housing (1), characterized in that: The inner cavity of the housing (1) has detection pool shell walls (13) on both the left and right sides. The two detection pool shell walls (13) form a detection pool cavity. The housing (1) has an inlet (11) at the top of the detection pool cavity and an outlet (12) at the bottom of the detection pool cavity. The inlet (11) and outlet (12) are connected to the detection pool cavity. A lens cavity is formed on the front side of the detection pool cavity inside the housing (1), and an imaging cavity is formed on the rear side of the detection pool cavity inside the housing (1). A laser (2) is inserted into one side of the housing (1), and one end of the laser (2) is inserted into the lens cavity. The top and bottom of the lens cavity and the imaging cavity are provided with The lens cavity is provided with slide rails (18), and a front slide groove (14) is provided at the top of the lens cavity. A first beam expander (3) and a second beam expander (4) are respectively provided between the slide rails (18) of the lens cavity. The tops of the first beam expander (3) and the second beam expander (4) extend through the front slide groove (14) to the top of the housing (1). A Fourier spectrum transform lens frame (5) and an imaging lens frame (6) are respectively provided between the slide rails (18) of the imaging cavity. An image sensor (7) is provided at the rear end of the imaging cavity. A rear slide groove (17) is provided at the top of the imaging cavity. The top of the Fourier spectrum transform lens frame (5) extends through the rear slide groove (17) to the top of the housing (1).
2. The bubble detection device according to claim 1, characterized in that: A heat sink (21) is fitted onto one end surface of the laser (2).
3. The bubble detection device according to claim 1, characterized in that: The first beam expander lens frame (3), the second beam expander lens frame (4), and the Fourier spectrum transform lens frame (5) have the same structure. The first beam expander lens frame (3) includes a mounting frame (31). The top and the top of the mounting frame (31) are provided with a ferrule (32). The bottom of the ferrule (32) at the top is provided with a top screw (33). The top of the top screw (33) extends out of the outside of the housing (1). The top surface of the top screw (33) is fitted with a cap (34). The surface of the top screw (33) outside the housing (1) is fitted with an adjusting nut (35).
4. The bubble detection device according to claim 3, characterized in that: The bottom of the ferrule (32) located at the bottom is provided with a bottom lead screw (37). The surfaces of the top lead screw (33) and the bottom lead screw (37) are both fitted with a slide (36) that slides with the slide rail (18). The bottom of the bottom lead screw (37) extends through the slide (36) to the bottom of the slide (36). A limit nut (38) is fitted on the bottom surface of the bottom lead screw (37).
5. The bubble detection device according to claim 1, characterized in that: A front cover (15) is rotatably provided on the front side of the top of the housing (1), and the front cover (15) is provided on the top of the front slide groove (14). A rear cover (16) is rotatably provided on the rear side of the top of the housing (1), and the rear cover (16) is provided on the top of the rear slide groove (17). A handle (151) is provided on one side of both the front cover (15) and the rear cover (16).